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https://www.readbyqxmd.com/read/29334460/multiple-stimuli-responses-of-stereo-isomers-of-aie-active-ethynylene-bridged-and-pyridyl-modified-tetraphenylethene
#1
Zhaoyang Wang, Xiao Cheng, Anjun Qin, Haoke Zhang, Jing Zhi Sun, Ben Zhong Tang
Luminescent molecules with aggregation-induced emission (AIE) property, or AIE-gens are typical stimuli-responsive materials and many AIE-gens have shown luminescent responses to mechano-, thermo-, electro-, vapo- and/or solvato-stimulus, but the detailed structure-property relationship has been addressed for only few of them. Here, we report a tetraphenylethene (TPE) derivative with pyridyl modifiers and ethynylene bridges. The (Z)- and (E)-isomers are clearly purified and both of them are AIE-active and demonstrate multiple luminescent responses to external stimuli...
January 15, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29332811/manufacture-and-application-of-ruo2-solid-state-metal-oxide-ph-sensor-to-common-beverages
#2
W Lonsdale, M Wajrak, K Alameh
A new reproducible solid-state metal-oxide pH sensor for beverage quality monitoring is developed and characterised. The working electrode of the developed pH sensor is based on the use of laser-etched sputter-deposited RuO2 on Al2O3 substrate, modified with thin layers of sputter-deposited Ta2O5 and drop-cast Nafion for minimisation of redox interference. The reference electrode is manufactured by further modifying a working electrode with a porous polyvinyl butyral layer loaded with fumed SiO2. The developed pH sensor shows excellent performance when applied to a selection of beverage samples, with a measured accuracy within 0...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29330808/detection-of-hypoxia-and-hif-in-paraffin-embedded-tumor-tissues
#3
Fuming Li, Kyoung Eun Lee, M Celeste Simon
Hypoxia (insufficient O2 availability) is involved in various biological processes, such as tumorigenesis and inflammation. Hypoxia results in stabilization of hypoxia-inducible factors (HIFs) including HIF1α and HIF2α. Here we describe a protocol to detect mouse and human tissue hypoxia by using Hypoxyprobe and immunohistochemical staining for HIF1α and HIF2α.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29310286/poly-glyceryl-monomethacrylate-co-ethylene-glycol-dimethacrylate-monolithic-columns-with-incorporated-bare-and-surface-modified-gluconamide-fumed-silica-nanoparticles-for-hydrophilic-interaction-capillary-electrochromatography
#4
Nisansala Ganewatta, Ziad El Rassi
This research article presents the preparation and characterization of monolithic capillary columns with incorporated bare fumed silica nanoparticles (FSNPs) and surface coated gluconamide FSNPs and their subsequent use in hydrophilic interaction capillary electrochromatography (HI-CEC) of small relatively polar solutes. The monolithic support was based on the in situ polymerization of glyceryl monomethacrylate (GMM) and ethylene glycol dimethacrylate (EDMA) yielding the poly(GMM-co-EDMA) monolith for the incorporation of bare and gluconamide-FNSPs...
March 1, 2018: Talanta
https://www.readbyqxmd.com/read/29305777/glycosaminoglycans-from-bovine-eye-vitreous-humour-and-interaction-with-collagen-type-ii
#5
Yanfei Peng, Yanlei Yu, Lei Lin, Xinyue Liu, Xing Zhang, Peipei Wang, Pauline Hoffman, So Young Kim, Fuming Zhang, Robert J Linhardt
Glycosaminoglycans (GAGs) play an important role in stabilizing the gel state of eye vitreous humour. In this study, the composition of GAGs present in bovine eye vitreous was characterized through disaccharide analysis by liquid chromatography-mass spectrometry. The interaction of GAGs with collagen type II was assessed using surface plasmon resonance (SPR). The percentage of hyaluronic acid (HA), chondroitin sulfate (CS) and heparan sulfate (HS), of total GAG, were 96.2%, 3.5% and 0.3%, respectively. The disaccharide composition of CS consisted of 4S (49%), 0S (38%) 6S (12%), 2S6S (1...
January 5, 2018: Glycoconjugate Journal
https://www.readbyqxmd.com/read/29289307/water-based-alkyl-ketene-dimer-ink-for-user-friendly-patterning-in-paper-microfluidics
#6
Nurul Nadiah Hamidon, Yumiao Hong, Gert Ij Salentijn, Elisabeth Verpoorte
We propose the use of water-based alkyl ketene dimer (AKD) ink for fast and user-friendly patterning of paper microfluidic devices either manually or using an inexpensive XY-plotter. The ink was produced by dissolving hydrophobic AKD in chloroform and emulsifying the solution in water. The emulsification was performed in a warm water bath, which led to an increased rate of the evaporation of chloroform. Subsequent cooling led to the final product, an aqueous suspension of fine AKD particles. The effects of surfactant and AKD concentrations, emulsification procedure, and cooling approach on final ink properties are presented, along with an optimized protocol for its formulation...
February 13, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29281646/energy-saving-method-for-technogenic-waste-processing
#7
Bayandy Dikhanbaev, Chandima Gomes, Aristan Bayandievich Dikhanbaev
Dumps of a mining-metallurgical complex of post-Soviet Republics have accumulated a huge amount of technogenic waste products. Out of them, Kazakhstan alone has preserved about 20 billion tons. In the field of technogenic waste treatment, there is still no technical solution that leads it to be a profitable process. Recent global trends prompted scientists to focus on developing energy-saving and a highly efficient melting unit that can significantly reduce specific fuel consumption. This paper reports, the development of a new technological method-smelt layer of inversion phase...
2017: PloS One
https://www.readbyqxmd.com/read/29275438/effect-of-hydrophobic-surface-treated-fumed-silica-fillers-on-a-one-bottle-etch-and-rinse-model-dental-adhesive
#8
Jing Wang, Qingsong Yu, Zhiyuan Yang
The objective of this study was to investigate the effect of hydrophobic surface treatment to fumed silica fillers on the bonding performance of a one-bottle etch and rinse model dental adhesive. In this study, 0.5-5 wt.% of Filler 1 and Filler 2 were loaded into BisGMA/HEMA model dental adhesive. Filler 1 was not treated, while Filler 2 was surface treated with a dimethyl silicone fluid making the silica extremely hydrophobic. The prepared adhesives were characterized through measurements of viscosity, degree of conversion, and water contact angle...
December 23, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29247631/the-effects-of-trait-impulsivity-on-proactive-and-reactive-interference-control
#9
Ling Xiang, Yan Chen, Antao Chen, Fenghua Zhang, Fuming Xu, Baoxi Wang
The current study used event-related brain potentials (ERPs) to explore whether self-reported trait impulsivity in healthy individuals might be differentially related to proactive and reactive interference control. Participants with high and low impulsivity (HI and LI, respectively) performed a modified version of the prime-target interference task. Proactive interference control was induced in the mostly incongruent (MI) context and reactive interference control was induced in the mostly congruent (MC) context...
December 13, 2017: Brain Research
https://www.readbyqxmd.com/read/29239217/effects-of-occupational-exposure-to-aluminium-on-some-oxidative-stress-and-dna-damage-parameters
#10
A M Samir, L A Rashed
AIM: The aim of this work was to investigate the relationships between aluminium levels, oxidative status and DNA damage in workers occupationally exposed to aluminium. SUBJECTS AND METHODS: This study was conducted in a secondary aluminium smelter. It included 96 male workers occupationally exposed to aluminium fume and dust compared to 96 male nonexposed individuals. Full history and clinical examination were done for all participants. Laboratory investigations in the form of serum aluminium, total antioxidant capacity (TAC), urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG) and comet assay test were performed...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29238185/occupational-exposure-to-vapor-gas-dust-or-fumes-and-chronic-airflow-limitation-copd-and-emphysema-the-swedish-cardiopulmonary-bioimage-study-scapis-pilot
#11
Kjell Torén, Jenny Vikgren, Anna-Carin Olin, Annika Rosengren, Göran Bergström, John Brandberg
Background: The aim of this study was to estimate the occupational burden of airflow limitation, chronic airflow limitation, COPD, and emphysema. Materials and methods: Subjects aged 50-64 years (n=1,050) were investigated with forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC). Airflow limitation was defined as FEV1/FVC <0.7 before bronchodilation. Chronic airflow limitation was defined after bronchodilation either according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD) as FEV1/FVC <0...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29238123/epidemiology-triggers-and-severity-of-childhood-asthma-in-ilesa-nigeria-implications-for-management-and-control
#12
Bankole Peter Kuti, Kehinde Oluyori Omole
Background: Knowledge about childhood asthma in a locality will assist clinicians to adequately manage the condition. This study set out to report the epidemiology, triggers of exacerbation, comorbid conditions, and severity of childhood asthma at a tertiary health facility in Nigeria and the implication of these, in management and symptoms control. Methods: Over a 15-month study period, children (aged <15 years) with physician-diagnosed asthma were consecutively recruited at the pediatric chest clinic of the hospital...
January 2017: Nigerian Medical Journal: Journal of the Nigeria Medical Association
https://www.readbyqxmd.com/read/29237994/evaluation-of-operational-parameters-role-on-the-emission-of-fumes
#13
Javad Sajedifar, Amir Hossein Kokabi, Somayeh Farhang Dehghan, Ahmad Mehri, Kamal Azam, Farideh Golbabaei
Electric arc welding is a routine operation in the construction of metallic structures, but the fumes generated during the welding process can threaten the health of welders. Fumes are undesirable products of the majority of welding operations and may have various detrimental effects on health. The purpose of this study was to investigate the effect of operational parameters of the shielded metal arc welding (SMAW) process on the emission of fumes. A dust monitor was used to measure the number and mass concentration of fumes generated by SMAW...
December 12, 2017: Industrial Health
https://www.readbyqxmd.com/read/29237731/naked-mole-rat-acid-sensing-ion-channel-3-forms-nonfunctional-homomers-but-functional-heteromers
#14
Laura-Nadine Schuhmacher, Gerard Callejo, Shyam Srivats, Ewan St John Smith
Acid-sensing ion channels (ASICs) form both homotrimeric and heterotrimeric ion channels that are activated by extracellular protons and are involved in a wide range of physiological and pathophysiological processes, including pain and anxiety. ASIC proteins can form both homotrimeric and heterotrimeric ion channels. The ASIC3 subunit has been shown to be of particular importance in the peripheral nervous system with pharmacological and genetic manipulations demonstrating a role in pain. Naked mole-rats, despite having functional ASICs, are insensitive to acid as a noxious stimulus and show diminished avoidance of acidic fumes, ammonia and carbon dioxide...
December 13, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29223455/recyclable-colorimetric-sensor-of-cr3-and-pb2-ions-simultaneously-using-a-zwitterionic-amino-acid-modified-gold-nanoparticles
#15
Fuming Sang, Xin Li, Zhizhou Zhang, Jia Liu, Guofu Chen
In this work, a rapid, simple and sensitive colorimetric sensor for simultaneous (or respective) detection of Cr3+ and Pb2+ using tyrosine functionalized gold nanoparticles (AuNPsTyr) has been developed. Tyrosine, a natural and zwitterionic amino acid, could be as a reducing and capping agent to synthesise AuNPs and allow for the simultaneous and selective detection of Cr3+ and Pb2+. Upon the addition of Cr3+ or Pb2+ (a combination of them), the color of AuNPsTyr solution changes from red to blue grey and the characteristic surface plasmon resonance (SPR) band is red-shifted to 580nm due to the aggregation of AuNPs...
November 27, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29206638/work-related-asthma-in-a-sample-of-subjects-with-established-asthma
#16
Donatella Talini, Alessandro Ciberti, Dusca Bartoli, Paolo Del Guerra, Tonina Enza Iaia, Maria Lemmi, Andrea Innocenti, Francesco Di Pede, Manuela Latorre, Laura Carrozzi, Pierluigi Paggiaro
OBJECTIVE: To assess the impact of occupational exposure to irritants or sensitizers on the occurrence, recrudescence and worsening of asthma and to identify unrecognized cases of work related asthma (WRA) including Work-Exacerbated Asthma (WEA) and Occupational Asthma (OA), in a general asthma clinic population sample. SETTING, DESIGN AND PARTICIPANTS: The study was a population-based cross sectional survey. 1289 asthmatic subjects (from 15 to 46 yrs old) living in a vast district of Tuscany (Italy) were identified from the Medical Reimbursement Register of the National Health System...
September 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/29205713/ultralong-phosphorescence-from-organic-ionic-crystals-under-ambient-conditions
#17
Zhichao Cheng, Huifang Shi, Huili Ma, Lifang Bian, Qi Wu, Long Gu, Shuzhi Cai, Xuan Wang, Wei-Wei Xiong, Zhongfu An, Wei Huang
We report on a new type of material system of organic salts in crystal state with ultralong organic phosphorescence (UOP) under ambient conditions. The change of cations (NH4+, Na+ or K+) in these phosphors gives access to tunable UOP colors ranging from sky blue to yellow green, along with ultralong emission lifetimes of over 504 ms. Single-crystal analysis reveals that unique ionic bonding can promote an ordered arrangement of organic salts in crystal state, which then can facilitate molecular aggregation for UOP generation...
December 3, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/29204477/data-for-the-physical-and-mechanical-properties-of-high-volume-fly-ash-cement-paste-composites
#18
Ertug Aydin, Hasan Şahan Arel
The data presented herein are compiled of the research summary of "Characterization of High-Volume Fly-Ash Cement Paste for Sustainable Construction Application" (Aydin and Arel, 2017) [1]. This data article provides general information about the ASTM Class C and Class F fly ash cement paste composites composed of silica fume, lime, water reducing admixtures in three different level of workability (0 mm, 100 mm and 200 mm). The dataset here also helps the readers to understand the links with the basic properties of the ingredients, for example, how can porosity be predicted based on the mixture design? how can the strength of the material be linked with the basic strengths of the constituent ingredients?...
February 2018: Data in Brief
https://www.readbyqxmd.com/read/29201053/superfast-set-strong-and-less-degradable-mineral-trioxide-aggregate-cement
#19
Abdullah Alqedairi, Carlos A Muñoz-Viveros, Eugene A Pantera, Marc Campillo-Funollet, Hussam Alfawaz, Ensanya Ali Abou Neel, Tariq S Abuhaimed
Purpose: Despite the good sealing ability and biocompatibility of mineral trioxide aggregate (MTA), its slow setting, high degradation, and weakness limit its use in surgical endodontics and high stress-bearing areas. This study aimed to develop two new liquids to control these drawbacks. They were prepared from calcium chloride, fumed silica, and hydroxyapatite or calcium phosphate and coded "H" and "P," respectively. Methods: Portland cement, Grey ProRoot® MTA, and white ProRoot MTA were mixed with distilled water (control) or liquid "H" or "P...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/29200472/surveillance-or-self-surveillance-behavioral-cues-can-increase-the-rate-of-drivers-pro-environmental-behavior-at-a-long-wait-stop
#20
Rose Meleady, Dominic Abrams, Julie Van de Vyver, Tim Hopthrow, Lynsey Mahmood, Abigail Player, Ruth Lamont, Ana C Leite
By leaving their engines idling for long periods, drivers contribute unnecessarily to air pollution, waste fuel, and produce noise and fumes that harm the environment. Railway level crossings are sites where many cars idle, many times a day. In this research, testing two psychological theories of influence, we examine the potential to encourage drivers to switch off their ignition while waiting at rail crossings. Two field studies presented different signs at a busy rail crossing site with a 2-min average wait...
December 2017: Environment and Behavior
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